linux-kernel - Re: [RFC PATCH] rcu: move SRCU grace period work to power efficient workqueue

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Message-ID: <1393266333.5560.15.camel@marge.simpson.net>
Date:	Mon, 24 Feb 2014 19:25:33 +0100
From:	Mike Galbraith <bitbucket@...ine.de>
To:	Kevin Hilman <khilman@...aro.org>
Cc:	paulmck@...ux.vnet.ibm.com, Tejun Heo <tj@...nel.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Lai Jiangshan <laijs@...fujitsu.com>,
	Zoran Markovic <zoran.markovic@...aro.org>,
	linux-kernel@...r.kernel.org,
	Shaibal Dutta <shaibal.dutta@...adcom.com>,
	Dipankar Sarma <dipankar@...ibm.com>
Subject: Re: [RFC PATCH] rcu: move SRCU grace period work to power efficient
 workqueue

On Mon, 2014-02-24 at 09:55 -0800, Kevin Hilman wrote:

> Yeah, my patch only addresses the nohz_full case, but since there
> doesn't seem to be any general agreemenet about the generic case, it
> seems that exposing all unbound workqueues via WQ_SYSFS is the way to
> go.  
> 
> Mike, looks like you may have started on that.  Did it get any further?

No, work gets in the way of tinker time.  Not sure which way I want to
explore anyway.  On the one hand, auto-quiesce thingy tied to domain
construction/destruction sounds good, but on the other, just handing
control to the user is highly attractive.. likely lots simpler too.

-Mike

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